Big Joe Joey J1 Series Maintenance And Repair Parts Manual page 34

245 DATA ACQUISITION
244 GAIN EEPROM KO
246 MICRO SLAVE KO
247 CAN BUS KO
248 S.P OUT OF RANGE
249 F.B OUT OF RANGE
3-18
This alarm occurs when acquiring the
motor resistance or when adjusting the
parameters to compensate for the gain
of the current amplifiers (maximum
current factory adjusted).
The parameter to compensate for the
gain of the current amplifiers
(ADJUSTMENT #03 and ADJUST-
MENT #4) are recorded in a non-vola-
tile memory (eeprom) with a redundant
handling. In fact every adjustment is
recorded in three eeprom locations. If
the values in these three locations are
different, this alarm occurs.
In stepper motor application, this alarm
occurs if the main uC is detecting a
direction of the stepper motor not
matched with the one that the slave uC
is detecting.
In the closed loop application, this alarm
occurs if the main uC is detecting a
direction of the steering error not
matched with the one that the slave uC
is detecting.
Furthermore, this alarm occurs if the
main uC is detecting no steering limita-
tion while the slave uC is detecting a
steering limitation.
This alarm occurs only when the setting
CAN BUS is PRESRENT. Then the
eps-ac0 must receive the event mes-
sages from the traction controller. If
these messages lack more than about
1 sec, this alarm occurs.
This alarm occurs for a fault on the com-
mand potentiometer (CPOC1 on
CNA#9, CPOC2 on CNA#8). When a
single command pot is chosen, the
alarm occurs if its wiper (CPOC1)
range is from 0.8 Vdc to 4.2 Vdc. When
the twin pot is chosen, the alarm
occurs if the sum of the two wiper volt-
ages (CPOC1+CPOC2) range is from
4.5 Vdc to 5.5 Vdc.
This alarm occurs for a fault on the feed-
back potentiometer (CPOT on
CNB#6). It occurs if CPOT exits the
range of 0.3 Vdc to 4.7 Vdc.
Recycle the key.
Replace the controller.
Replace the controller.
Check the CAN Bus communication sys-
tem and analyze the frames from the
traction controller to the steer control-
lers.
Check the connections of the potentio-
meter. This alarm occurs when one
connection of the command potentio-
meter is broken.
Check the connections of the feedback
potentiometer. This alarm occurs when
one connection of the feedback poten-
tiometer is broken.
BL-J1-0315 - 11-19-2019